MESON Chess Problem Database

Problem Display
PID: 243926 (4Q3/2pqp3/7N/1RPk4/P1p2P2/1N1PBp1b/BPP5/n2KR3 w - - 0 1)

Fleck, Ferenc

Magyar Sakkelet, 1966

4Q3/2pqp3/7N/1RPk4/P1p2P2/1N1PBp1b/BPP5/n2KR3

#2

14 + 8

15148 Sadier Collection 2021

SOLUTION

  • SOUND
  • Sets
    • 1...Kc6
      • 2.Qa8#
    • 1...Ke6
      • 2.Qf7#
    • 1...Bf1
      • 2.Qxd7#
    • 1...Bg2
      • 2.Qxd7#
    • 1...e6
      • 2.Qxd7#
  • Tries
    • 1.Qg6?
      • threat
        • 2.Qe4#
        • 2.c6#
      • 1...Qxb5
        • 2.Qe4#
      • 1...Sxb3
        • 2.Qe4#
      • 1...cxd3
        • 2.Sxa1#
      • 1...Qd6
        • 2.Qe4#
      • 1...Be6
        • 2.Qe4#
      • 1...e6
        • 2.Qe4#
      • 1...Qf5
        • 2.c6#
      • 1...Qc6
        • 2.Qe4#
      • 1...Bf5
        • 2.c6#
      • 1...c6
        • 2.Qe4#
      • 1...e5
        • 2.c6#
      • 1...Qe6!
  • Keys
    • 1.dxc4+!
      • 1...Kxc4+
        • 2.Sd2#
      • 1...Ke4+
        • 2.Bd2#
      • 1...Kc6+
        • 2.Sd4#
      • 1...Ke6+
        • 2.Bd4#

FEATURES

  • Static
    • TYPE = CHECKING_KEY
    • CHANGED MATES = 2
    • ADDED MATES = 2
    • REMOVED MATES = 3
  • Sets
    • K(e);P_PINP(G),P_SPINQ(g),S_FLIGHT::QAB(N)
    • K(e);P_PINP(G),P_SPINP(h),S_FLIGHT::QAB1(N)
    • B(c);N_GUARD::QAR2(N),XQ(g)
    • P(h);S_CUTB(c)::QAR2(N),XQ(g)
  • Tries
    • Try
      • Q(N);
      • Threat
        • DUALS(2)
      • Vars
        • Q(g);XR(K)::QAB1(N)
        • S(a);XS(F)::QAB1(N)
        • P(d);XP(G)::B(C)+S(F),XS(a)
        • Q(g);::QAB1(N)
        • B(c);::QAB1(N)
        • P(h);::QAB1(N)
        • Q(g);::R(K)+P(L)
        • Q(g);SBLOCK::QAB1(N)
        • B(c);::R(K)+P(L)
        • P(f);SBLOCK::QAB1(N)
        • P(h);::R(K)+P(L)
      • Refutation
        • Q(g);
  • Actual
    • P(G);CHECK,XP(d)
    • Vars
      • K(e);CHECK,S_FLIGHT,XP(G)::B(C)+S(F),DCHECK
      • K(e);CHECK,P_SPINP(h),S_FLIGHT::R(B)+B(H)
      • K(e);CHECK,P_SPINQ(g),S_FLIGHT::S(F)
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Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) & CSS/Javascript (jQuery, Bootstrap & DataTables).